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fix(billing): 修复 Gemini 缓存 token 重复计费问题 #338

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Merged
ding113 merged 1 commit into from
Dec 13, 2025
Merged

fix(billing): 修复 Gemini 缓存 token 重复计费问题 #338

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7 changes: 6 additions & 1 deletion src/app/v1/_lib/proxy/response-handler.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1200,8 +1200,13 @@ function extractUsageMetrics(value: unknown): UsageMetrics | null {
}

// Gemini support
// 注意：promptTokenCount 包含 cachedContentTokenCount，需要减去以避免重复计费
// 计费公式：input = (promptTokenCount - cachedContentTokenCount) × input_price
// cache = cachedContentTokenCount × cache_price
if (typeof usage.promptTokenCount === "number") {
result.input_tokens = usage.promptTokenCount;
const cachedTokens =
typeof usage.cachedContentTokenCount === "number" ? usage.cachedContentTokenCount : 0;
result.input_tokens = Math.max(usage.promptTokenCount - cachedTokens, 0);
hasAny = true;
}
if (typeof usage.candidatesTokenCount === "number") {
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